Eh I wouldn't say you won't be frustrated. You won't get Game Over due to 1-ups but having to repeat certain stars over and over can get quite frustrating even with the checkpoints. And then there are those certain stars that don't have checkpoints like the purple comets.

235 Mario
35 Luigi

that puple coins in the ghostly race thing is just absolutely confounding me right now. Bouldergeist was no problem to do on daredevil, once I got the hang of taking him down normally.

Once I beat the thing, I guess I'll go back through and beat it all without dying.

Hm... Dare I look at mine. I bet I've over 300 total. I tried Purple Coins on Luigi with Mario for like a week ^^

Oh, snaaap!
Mario: 249
Luigi: 108
Total: 357
Lets see if anyone tops that :D

Mine wouldn't be accurate as I would often turn the console off after losing most of my lives to try to get Luigi's Purple coins to do something else but I probably lost 150 lives just on that level (plus another 50 with the green guy*).

As for Bouldergeist's daredevil run it only took me 2-3 lives as did it almost straight after doing the normal run in which I lost like 10-20 lives so I had it in my mind pretty well.

*not saying his name for the one guy under a rock who wasn't spoiled the surprise yet.

325 with mario, 317 with Luigi. total of 642 deads, yet I never lost a single game over, way too many 1ups everywhere (;
Well, I love to play carelessly and do stupid and risky things hence the insane amount of deads.

oh i havnt beet i yet still gotta find out

48 M
31 L

196 for mario

And I lost more than 50 because of that ball thing and the lava.

I wished I could move the ball without the mote and just with the dialogue stick on the nunchuck...

ROFL ^